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4″ Corrugated FittingsFrench Drain Man2025-05-14T16:22:42-04:00

4″ Corrugated Fittings

There’s a new coupler in town

FDM’s 4 in. Corrugated to PVC Coupler now has a female counterpart.

4″ Corrugated Fittings

There’s a new coupler in town

FDM’s 4 in. Corrugated to PVC Coupler now has a female counterpart.

4″ Corrugated Fittings

There’s a new coupler in town

FDM’s 4 in. Corrugated to PVC Coupler now has a female counterpart.

4 in. corrugated to 4 in. PVC coupler

Featured 4 in Corrugated Fittings & Couplers

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TORRENTIAL RAIN™ 4 in. Drain Line Clean Out
Connects to 4 in. Corrugated
35% Off

Original price was: $53.90.Current price is: $35.30.
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Heavy Duty Pipe Staples
6 in. x 8 in. (qty. 30)

$17.25
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Dual Wall Riser for Downspout Vented Cleanout with Leaf Filter

$7.50
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TORRENTIAL RAIN™ 4 in. Solid Drain Cover

Original price was: $9.50.Current price is: $7.50.
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TORRENTIAL RAIN™ 4 in. Full Throttle Drain Grate

Original price was: $8.50.Current price is: $5.50.
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TORRENTIAL RAIN™ 4 in. Catch Basin Riser

Starting From: $6.50
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TORRENTIAL RAIN™ 4 in. Corrugated End Cap

$3.65 – $3.95
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TORRENTIAL RAIN™ 4 in. External Snap Coupler HDPE

Original price was: $9.50.Current price is: $6.95.
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TORRENTIAL RAIN™ 4 in. External Snap Coupler to 3 in. Corrugated Combo
Fits any 3 or 4 in. Corrugated

$8.95
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4 in. Corrugated Drain Tile Wye
12% Off

Original price was: $10.00.Current price is: $8.75.
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TORRENTIAL RAIN™ 4 in. Not Quite a 90 Degree Fitting
Connects to 4 in. Corrugated and 4 in. PVC
30% off

Original price was: $19.95.Current price is: $13.95.
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TORRENTIAL RAIN™ 4 in. Not Quite a 90 Degree Fitting
Connects to 4 in Corrugated
27% off

Original price was: $24.75.Current price is: $18.00.
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TORRENTIAL RAIN™ 4 in. Corrugated to 4 in. PVC HDPE Coupler
male and female adapters
40% off

$11.95 – $13.95
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EXTRA Heavy-Duty 4 in. Wye Fitting
44% off

Original price was: $25.00.Current price is: $14.00.
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4 in. x 3 in. Single Wall Tee Extra Heavy Duty
Connects to 3 in. and 4 in. Corrugated
29% off

Original price was: $18.00.Current price is: $10.10.
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4 in. Corrugated Tee Extra Heavy Duty

$10.10
Out of stock

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6 in. x 4 in. Single Wall Corrugated Tee Extra Heavy Duty
25% off

Original price was: $25.00.Current price is: $21.95.
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6 in. x 4 in. Corrugated Reducer Extra Heavy Duty
25% off

Original price was: $19.95.Current price is: $14.95.
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5 in. x 4 in. Corrugated Reducer

Original price was: $17.95.Current price is: $11.95.
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6 in. x 5 in. x 4 in. Reducing Single Wall Corrugated Wye

$18.95
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5 in. x 4 in. x 5 in. Corrugated Single Wall Tee

Original price was: $20.00.Current price is: $14.95.
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TORRENTIAL RAIN™ Flow Gate for 4 in. Corrugated Pipe
Connects to 4 in Corrugated

$31.51

More Fittings and Couplers

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4 in. Corrugated Dual-Wall 90-Degree Elbow
Up to 20% off

Starting From: $3.60
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4″ Wye with 3×4 Reducer
Up to 20% off

Starting From: $18.84
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4 in. Single Wall Wye and 45° Fitting Combination
Up to 20% off

Starting From: $20.80
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3 in. x 4 in. Single Wall Reducing Coupler
Up to 20% off

Starting From: $5.02
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1-1/2 in. Flex Sump Pump Line to 4 in. Corrugated Fitting
Up to 20% off

Starting From: $48.00
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FDM Bushing for Connecting Outdoor Sump Pump Line to 4 in. Corrugated
Up to 20% off

Starting From: $21.60
Out of stock

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4 in. Critter Guard, Stainless Steel
Up to 20% off

Starting From: $13.60
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6 in. x 4 in. Polyethylene Slip Snap Reducing Coupler
Up to 20% off

Starting From: $8.00
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3 in. x 4 in. x 4 in. Corrugated Drain Tile Downspout Adapter
Up to 20% off

Starting From: $6.37
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4 in. Corrugated Single Wall Cross Tee
Up to 20% off

Starting From: $19.20
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2 in. x 3 in. x 4 in. Corrugated Drain Tile Downspout Adapter with Trim Ring
Up to 20% off

Starting From: $5.56
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4 in. Single Wall Corrugated Drain Tile 45-Degree Elbow
Up to 20% off

Starting From: $10.40
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4 in. Single Wall Corrugated Drain Tile 90-Degree Elbow
Up to 20% off

Starting From: $7.20
Out of stock

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FDM Corrugated Pipe Adapter aka Cone (4 in. corrugated to 4 in. SDR 35)

Starting From: $0.00
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4 in. Corrugated Pipe Adapter to 4 in. PVC
Up to 20% off

Starting From: $11.20
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4 in. x 18 in. Corrugated Drain Tile Dual-Wall with Critter Guard
Up to 20% off

Starting From: $22.80

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